As excavation surveys on buried cultural heritages have been recently increased due to active land development, archaeological site museums, which were built in the excavated and later preserved sites, have been also increased. This is a desirable phenomenon in terms of preservation of the sites and expansion of the rights to share cultural heritages. but, Many problems related to the management and operation of the site and related museum facilities rose as the wide range of archaeological site museums in terms of the size, type and operation scheme without well-established concepts and management regulations have been rapidly increased. Also, Unlike other general museums, archaeological site museums are built in situ, allowing to provide the public education through field observation and active participation. Nevertheless, many archaeological site museums have been poorly managed since their establishment and they fail to play the basic roles of preserving archaeological sites and do the core function of the museum. In this thesis, 36 archaeological site museums with various titles including exhibition halls, exhibition galleries, history galleries, archives, and public information centers, were analyzed and their improvement measures are proposed. The results show that. There are 20 first-tiered museums and one second-tiered museums registered under the Museums and Art Museum Promotion Act, On the other hand, 15 museums, which occupy more than 41% of the total archaeological site museum, are unregistered. Registered museums have minimum standards in facilities and manpower because they have registration requirements, but most unregistered museums lack facilities and manpower structure, exposing various problems. 53% of unregistered museums do not have academic and arts workers, and in some cases, they do not even have administrative personnel and operate only as volunteers. In addition, only 27% of unregistered museums have planned exhibition rooms, 60% do not have storage, and 80% do not have educational facilities. Lack of facilities and professional staff leads to poor operation and management of museums, with 86% of unregistered museums operating permanent exhibitions without replacing exhibits annually, and about 73% do not operate a single educational program, It is also confirmed that many museums fail to conduct periodic preservation treatment of preserved store cultural properties. As above, the lack of operation and management of unregistered historical museums is believed to be due to the lack of clear standards for the establishment and operation of archaeological site museums. In other words, the museum was established on a minimum basis for the purpose of the later preserved sites after the excavation survey, the reality is that but due to insufficient regulations, follow-up management has not been properly carried out due to financial conditions of local governments, which are operating entities. Therefore, in order to achieve the operation functions of archaeological site museums and revitalize its operation, the current “Museum and Art Gallery Promotion Act” was revised to add the concept of archaeological site and ‘regulations related to the establishment and operation of archaeological site museums’ should be enacted to clarify operational measures, including facilities, personnel, and preservation treatment so that various distinctive exhibitions and education programs suitable to the characteristics of the individual archaeological site museum for the public to share and explore cultural heritage, are need to be operated.